Raspberry Pi 4B connected via micro-HDMI to HDMI cable to a 1920x1080 computer monitor. The boot sequence starts with text being printed to the screen (splash screen off) and when it should switch to graphics mode, it goes blank. The monitor says there is no signal and then goes into standby mode. Pi OS is running and I can ssh in.

What I've tried:

  • Uncomment hdmi_force_hotplug=1
  • Uncomment and set hdmi_group=2 and hdmi_mode=82
  • Same with hdmi_drive=2 and config_hdmi_boost=4

If I reboot over ssh I can see the boot sequence again but no graphics. What else can I try? Is it possible this is because of a faulty cable? I don't have any other micro HDMI to HDMI to try, and this one can transfer low res (640x480 text mode).


After trying many configs and workarounds I found this thread https://github.com/raspberrypi/firmware/issues/1647.

I ssh into Pi and edited /boot/config.txt to comment out this line, uncommented by default on the PiOS image. After reboot the graphic environment was finally available.


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